/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem03_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:22:17,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:22:17,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:22:17,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:22:17,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:22:17,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:22:17,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:22:17,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:22:17,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:22:17,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:22:17,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:22:17,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:22:17,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:22:17,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:22:17,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:22:17,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:22:17,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:22:17,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:22:17,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:22:17,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:22:17,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:22:17,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:22:17,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:22:17,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:22:17,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 21:22:17,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:22:17,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:22:17,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:22:17,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:22:17,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:22:17,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:22:17,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:22:17,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:22:17,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:22:17,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:22:17,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:22:17,795 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 21:22:17,819 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:22:17,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:22:17,820 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:22:17,820 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:22:17,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:22:17,821 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:22:17,821 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:22:17,821 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:22:17,821 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:22:17,821 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:22:17,822 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:22:17,822 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:22:17,822 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:22:17,822 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:22:17,822 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:22:17,822 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:22:17,822 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:22:17,822 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:22:17,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:22:17,823 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:22:17,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:22:17,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:22:17,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:22:17,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:22:17,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:22:17,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:22:17,824 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:22:17,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:22:17,824 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:22:17,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:22:17,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:22:17,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:22:17,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:22:17,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:22:17,825 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:22:17,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:22:17,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:22:17,825 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:22:17,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:22:17,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:22:17,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:22:17,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:22:17,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:22:17,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:22:17,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:22:17,991 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:22:17,992 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:22:17,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label56.c [2023-03-31 21:22:19,079 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:22:19,339 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:22:19,339 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label56.c [2023-03-31 21:22:19,353 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/209916da8/c146732baa8d42dfab1088ab7542e3e9/FLAGb48f9ef32 [2023-03-31 21:22:19,364 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/209916da8/c146732baa8d42dfab1088ab7542e3e9 [2023-03-31 21:22:19,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:22:19,367 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:22:19,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:22:19,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:22:19,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:22:19,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:22:19" (1/1) ... [2023-03-31 21:22:19,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b1d31b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:19, skipping insertion in model container [2023-03-31 21:22:19,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:22:19" (1/1) ... [2023-03-31 21:22:19,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:22:19,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:22:19,747 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label56.c[57575,57588] [2023-03-31 21:22:19,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:22:19,789 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:22:19,955 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label56.c[57575,57588] [2023-03-31 21:22:19,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:22:19,975 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:22:19,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:19 WrapperNode [2023-03-31 21:22:19,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:22:19,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:22:19,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:22:19,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:22:19,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:19" (1/1) ... [2023-03-31 21:22:19,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:19" (1/1) ... [2023-03-31 21:22:20,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:19" (1/1) ... [2023-03-31 21:22:20,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:19" (1/1) ... [2023-03-31 21:22:20,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:19" (1/1) ... [2023-03-31 21:22:20,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:19" (1/1) ... [2023-03-31 21:22:20,090 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:19" (1/1) ... [2023-03-31 21:22:20,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:19" (1/1) ... [2023-03-31 21:22:20,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:22:20,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:22:20,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:22:20,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:22:20,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:19" (1/1) ... [2023-03-31 21:22:20,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:22:20,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:22:20,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 21:22:20,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 21:22:20,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:22:20,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:22:20,160 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:22:20,160 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:22:20,160 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:22:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:22:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:22:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:22:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:22:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:22:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:22:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:22:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:22:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:22:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:22:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:22:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:22:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:22:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:22:20,256 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:22:20,258 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:22:21,410 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:22:21,638 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:22:21,638 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:22:21,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:22:21 BoogieIcfgContainer [2023-03-31 21:22:21,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:22:21,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:22:21,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:22:21,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:22:21,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:22:19" (1/3) ... [2023-03-31 21:22:21,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69fc507c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:22:21, skipping insertion in model container [2023-03-31 21:22:21,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:22:19" (2/3) ... [2023-03-31 21:22:21,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69fc507c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:22:21, skipping insertion in model container [2023-03-31 21:22:21,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:22:21" (3/3) ... [2023-03-31 21:22:21,645 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label56.c [2023-03-31 21:22:21,657 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:22:21,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:22:21,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:22:21,691 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4c0864cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:22:21,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:22:21,695 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:22:21,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-03-31 21:22:21,703 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:21,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:22:21,704 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:21,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:21,708 INFO L85 PathProgramCache]: Analyzing trace with hash 729860759, now seen corresponding path program 1 times [2023-03-31 21:22:21,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:21,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029716957] [2023-03-31 21:22:21,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:21,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:22,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:22,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029716957] [2023-03-31 21:22:22,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029716957] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:22,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:22:22,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:22:22,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679679393] [2023-03-31 21:22:22,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:22,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:22:22,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:22,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:22:22,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:22:22,679 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 21:22:23,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:23,344 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-03-31 21:22:23,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:22:23,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2023-03-31 21:22:23,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:23,368 INFO L225 Difference]: With dead ends: 462 [2023-03-31 21:22:23,368 INFO L226 Difference]: Without dead ends: 301 [2023-03-31 21:22:23,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:22:23,376 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 43 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:23,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 70 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 21:22:23,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-03-31 21:22:23,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-03-31 21:22:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.795221843003413) internal successors, (526), 293 states have internal predecessors, (526), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 21:22:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 535 transitions. [2023-03-31 21:22:23,438 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 535 transitions. Word has length 149 [2023-03-31 21:22:23,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:23,440 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 535 transitions. [2023-03-31 21:22:23,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 21:22:23,441 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 535 transitions. [2023-03-31 21:22:23,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-03-31 21:22:23,452 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:23,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:22:23,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:22:23,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:23,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:23,454 INFO L85 PathProgramCache]: Analyzing trace with hash -455546634, now seen corresponding path program 1 times [2023-03-31 21:22:23,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:23,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972483258] [2023-03-31 21:22:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:23,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:23,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:23,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972483258] [2023-03-31 21:22:23,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972483258] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:23,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:22:23,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:22:23,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419693979] [2023-03-31 21:22:23,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:23,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:22:23,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:23,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:22:23,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:22:23,784 INFO L87 Difference]: Start difference. First operand 301 states and 535 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:22:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:24,499 INFO L93 Difference]: Finished difference Result 917 states and 1650 transitions. [2023-03-31 21:22:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:22:24,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 161 [2023-03-31 21:22:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:24,506 INFO L225 Difference]: With dead ends: 917 [2023-03-31 21:22:24,506 INFO L226 Difference]: Without dead ends: 621 [2023-03-31 21:22:24,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:22:24,514 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 493 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:24,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 44 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 21:22:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2023-03-31 21:22:24,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 609. [2023-03-31 21:22:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 590 states have (on average 1.7474576271186442) internal successors, (1031), 597 states have internal predecessors, (1031), 6 states have call successors, (6), 6 states have call predecessors, (6), 12 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2023-03-31 21:22:24,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1065 transitions. [2023-03-31 21:22:24,564 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1065 transitions. Word has length 161 [2023-03-31 21:22:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:24,569 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 1065 transitions. [2023-03-31 21:22:24,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:22:24,570 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1065 transitions. [2023-03-31 21:22:24,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-03-31 21:22:24,572 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:24,572 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:22:24,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:22:24,573 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:24,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:24,574 INFO L85 PathProgramCache]: Analyzing trace with hash 271466215, now seen corresponding path program 1 times [2023-03-31 21:22:24,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:24,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431975899] [2023-03-31 21:22:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:24,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:25,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:25,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431975899] [2023-03-31 21:22:25,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431975899] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:25,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:22:25,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:22:25,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476018191] [2023-03-31 21:22:25,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:25,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:22:25,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:25,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:22:25,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:22:25,019 INFO L87 Difference]: Start difference. First operand 609 states and 1065 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:22:25,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:25,678 INFO L93 Difference]: Finished difference Result 1891 states and 3406 transitions. [2023-03-31 21:22:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:22:25,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 162 [2023-03-31 21:22:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:25,683 INFO L225 Difference]: With dead ends: 1891 [2023-03-31 21:22:25,683 INFO L226 Difference]: Without dead ends: 1287 [2023-03-31 21:22:25,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:22:25,685 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 500 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:25,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 43 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 21:22:25,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2023-03-31 21:22:25,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1245. [2023-03-31 21:22:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1194 states have (on average 1.4656616415410386) internal successors, (1750), 1225 states have internal predecessors, (1750), 10 states have call successors, (10), 10 states have call predecessors, (10), 40 states have return successors, (113), 9 states have call predecessors, (113), 9 states have call successors, (113) [2023-03-31 21:22:25,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1873 transitions. [2023-03-31 21:22:25,713 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1873 transitions. Word has length 162 [2023-03-31 21:22:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:25,713 INFO L495 AbstractCegarLoop]: Abstraction has 1245 states and 1873 transitions. [2023-03-31 21:22:25,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 4 states have internal predecessors, (156), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:22:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1873 transitions. [2023-03-31 21:22:25,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-03-31 21:22:25,716 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:25,716 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:22:25,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:22:25,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:25,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1237614638, now seen corresponding path program 1 times [2023-03-31 21:22:25,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:25,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751986815] [2023-03-31 21:22:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:25,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:25,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:25,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751986815] [2023-03-31 21:22:25,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751986815] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:25,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:22:25,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:22:25,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32912483] [2023-03-31 21:22:25,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:25,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:22:25,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:25,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:22:25,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:22:25,973 INFO L87 Difference]: Start difference. First operand 1245 states and 1873 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:22:26,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:26,681 INFO L93 Difference]: Finished difference Result 3847 states and 5978 transitions. [2023-03-31 21:22:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:22:26,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 165 [2023-03-31 21:22:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:26,690 INFO L225 Difference]: With dead ends: 3847 [2023-03-31 21:22:26,690 INFO L226 Difference]: Without dead ends: 2607 [2023-03-31 21:22:26,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:22:26,697 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 498 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:26,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 46 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 21:22:26,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2023-03-31 21:22:26,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 2541. [2023-03-31 21:22:26,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2414 states have (on average 1.3939519469759736) internal successors, (3365), 2505 states have internal predecessors, (3365), 18 states have call successors, (18), 18 states have call predecessors, (18), 108 states have return successors, (346), 17 states have call predecessors, (346), 17 states have call successors, (346) [2023-03-31 21:22:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 3729 transitions. [2023-03-31 21:22:26,759 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 3729 transitions. Word has length 165 [2023-03-31 21:22:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:26,759 INFO L495 AbstractCegarLoop]: Abstraction has 2541 states and 3729 transitions. [2023-03-31 21:22:26,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:22:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 3729 transitions. [2023-03-31 21:22:26,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-03-31 21:22:26,764 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:26,764 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:22:26,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:22:26,764 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:26,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:26,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2038822313, now seen corresponding path program 1 times [2023-03-31 21:22:26,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:26,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729544527] [2023-03-31 21:22:26,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:26,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:26,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:26,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729544527] [2023-03-31 21:22:26,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729544527] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:26,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:22:26,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:22:26,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729637236] [2023-03-31 21:22:26,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:26,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:22:26,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:26,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:22:26,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:22:26,979 INFO L87 Difference]: Start difference. First operand 2541 states and 3729 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:22:27,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:27,527 INFO L93 Difference]: Finished difference Result 7360 states and 11097 transitions. [2023-03-31 21:22:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:22:27,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 170 [2023-03-31 21:22:27,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:27,545 INFO L225 Difference]: With dead ends: 7360 [2023-03-31 21:22:27,546 INFO L226 Difference]: Without dead ends: 4824 [2023-03-31 21:22:27,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:22:27,551 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 46 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:27,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 239 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 21:22:27,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2023-03-31 21:22:27,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4822. [2023-03-31 21:22:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4822 states, 4627 states have (on average 1.30041063323968) internal successors, (6017), 4756 states have internal predecessors, (6017), 33 states have call successors, (33), 33 states have call predecessors, (33), 161 states have return successors, (692), 32 states have call predecessors, (692), 32 states have call successors, (692) [2023-03-31 21:22:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4822 states to 4822 states and 6742 transitions. [2023-03-31 21:22:27,649 INFO L78 Accepts]: Start accepts. Automaton has 4822 states and 6742 transitions. Word has length 170 [2023-03-31 21:22:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:27,650 INFO L495 AbstractCegarLoop]: Abstraction has 4822 states and 6742 transitions. [2023-03-31 21:22:27,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:22:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 4822 states and 6742 transitions. [2023-03-31 21:22:27,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-03-31 21:22:27,658 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:27,658 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:22:27,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 21:22:27,658 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:27,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:27,659 INFO L85 PathProgramCache]: Analyzing trace with hash -958009262, now seen corresponding path program 1 times [2023-03-31 21:22:27,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:27,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490212057] [2023-03-31 21:22:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:27,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:22:28,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:28,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490212057] [2023-03-31 21:22:28,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490212057] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:22:28,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813915427] [2023-03-31 21:22:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:28,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:22:28,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:22:28,118 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:22:28,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:22:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:28,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:22:28,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:22:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 21:22:28,564 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:22:28,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813915427] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:28,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:22:28,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-03-31 21:22:28,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080479513] [2023-03-31 21:22:28,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:28,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:22:28,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:28,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:22:28,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:22:28,566 INFO L87 Difference]: Start difference. First operand 4822 states and 6742 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:22:29,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:29,164 INFO L93 Difference]: Finished difference Result 11914 states and 17494 transitions. [2023-03-31 21:22:29,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:22:29,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 184 [2023-03-31 21:22:29,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:29,194 INFO L225 Difference]: With dead ends: 11914 [2023-03-31 21:22:29,194 INFO L226 Difference]: Without dead ends: 7097 [2023-03-31 21:22:29,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:22:29,205 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:29,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 278 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 21:22:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7097 states. [2023-03-31 21:22:29,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7097 to 7097. [2023-03-31 21:22:29,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 6837 states have (on average 1.2599093169518796) internal successors, (8614), 7001 states have internal predecessors, (8614), 48 states have call successors, (48), 48 states have call predecessors, (48), 211 states have return successors, (1090), 47 states have call predecessors, (1090), 47 states have call successors, (1090) [2023-03-31 21:22:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 9752 transitions. [2023-03-31 21:22:29,358 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 9752 transitions. Word has length 184 [2023-03-31 21:22:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:29,359 INFO L495 AbstractCegarLoop]: Abstraction has 7097 states and 9752 transitions. [2023-03-31 21:22:29,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:22:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 9752 transitions. [2023-03-31 21:22:29,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-03-31 21:22:29,374 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:29,375 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:22:29,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 21:22:29,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-03-31 21:22:29,581 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:29,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:29,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1357597722, now seen corresponding path program 1 times [2023-03-31 21:22:29,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:29,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669594399] [2023-03-31 21:22:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:29,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 44 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:22:30,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:30,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669594399] [2023-03-31 21:22:30,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669594399] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:22:30,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642692230] [2023-03-31 21:22:30,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:30,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:22:30,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:22:30,292 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:22:30,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:22:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:30,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:22:30,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:22:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:22:30,539 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:22:30,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642692230] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:22:30,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:22:30,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 21:22:30,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477835789] [2023-03-31 21:22:30,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:22:30,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:22:30,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:22:30,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:22:30,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:22:30,541 INFO L87 Difference]: Start difference. First operand 7097 states and 9752 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 4 states have internal predecessors, (179), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:22:31,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:22:31,355 INFO L93 Difference]: Finished difference Result 17703 states and 25156 transitions. [2023-03-31 21:22:31,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:22:31,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 4 states have internal predecessors, (179), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 199 [2023-03-31 21:22:31,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:22:31,400 INFO L225 Difference]: With dead ends: 17703 [2023-03-31 21:22:31,400 INFO L226 Difference]: Without dead ends: 10611 [2023-03-31 21:22:31,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-03-31 21:22:31,420 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 499 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 21:22:31,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 41 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 21:22:31,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10611 states. [2023-03-31 21:22:31,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10611 to 10549. [2023-03-31 21:22:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10549 states, 10136 states have (on average 1.2541436464088398) internal successors, (12712), 10409 states have internal predecessors, (12712), 70 states have call successors, (70), 70 states have call predecessors, (70), 342 states have return successors, (1782), 69 states have call predecessors, (1782), 69 states have call successors, (1782) [2023-03-31 21:22:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10549 states to 10549 states and 14564 transitions. [2023-03-31 21:22:31,759 INFO L78 Accepts]: Start accepts. Automaton has 10549 states and 14564 transitions. Word has length 199 [2023-03-31 21:22:31,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:22:31,759 INFO L495 AbstractCegarLoop]: Abstraction has 10549 states and 14564 transitions. [2023-03-31 21:22:31,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 4 states have internal predecessors, (179), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:22:31,760 INFO L276 IsEmpty]: Start isEmpty. Operand 10549 states and 14564 transitions. [2023-03-31 21:22:31,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-03-31 21:22:31,778 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:22:31,778 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:22:31,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 21:22:31,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-03-31 21:22:31,985 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:22:31,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:22:31,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1482711449, now seen corresponding path program 1 times [2023-03-31 21:22:31,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:22:31,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780231914] [2023-03-31 21:22:31,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:31,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:22:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 21:22:32,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:22:32,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780231914] [2023-03-31 21:22:32,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780231914] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:22:32,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657371858] [2023-03-31 21:22:32,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:22:32,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:22:32,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:22:32,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:22:32,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 21:22:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:22:32,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 21:22:32,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:22:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:22:32,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:22:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 73 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:22:32,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657371858] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:22:32,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1830487956] [2023-03-31 21:22:32,785 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-03-31 21:22:32,785 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:22:32,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:22:32,791 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:22:32,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:22:33,330 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-03-31 21:22:35,333 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 147 for LOIs